Microarrays can be used to examine gene expression and also to conduct genome-wide association studies (GWAS). Which of the following are true about these microarrays? Please select all that apply.

A) Both expression microarrays and GWAS arrays are hybridized with genomic DNA
B) Both expression microarrays and GWAS arrays are made of printed DNA features
C) Expression microarrays contain features from genes, GWAS arrays contain features from the whole genome
D) Both expression microarrays and GWAS arrays are made of printed RNA features